Preparation and slow-release performance of biomass-based slow-release urea

WANG Jie; NI Jie; ZHAO Zhangyou; WU Kejing; LU Houfang

doi:10.12434/j.issn.2097-2547.20250203

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Preparation and slow-release performance of biomass-based slow-release urea

更新时间：2026-05-22

- Preparation and slow-release performance of biomass-based slow-release urea
- Vol. 51, Issue 5, Pages: 68-76(2026)
- 作者机构：
  
  1.四川大学化学工程学院，四川成都 610065
  2.四川泸天化股份有限公司，四川泸州 646300
  3.四川大学新能源与低碳技术研究院，四川成都 610207
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250203
  CLC： TQ449;X712
- Received：28 April 2025，
  
  Revised：2025-05-15，
  
  Published：25 May 2026
- 稿件说明：
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王洁,倪杰,赵章有等.生物质基缓释尿素的制备及其缓释性能研究[J].低碳化学与化工,2026,51(5):68-76.

WANG Jie,NI Jie,ZHAO Zhangyou,et al.Preparation and slow-release performance of biomass-based slow-release urea[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(5):68-76.
王洁,倪杰,赵章有等.生物质基缓释尿素的制备及其缓释性能研究[J].低碳化学与化工,2026,51(5):68-76. DOI： 10.12434/j.issn.2097-2547.20250203.

WANG Jie,NI Jie,ZHAO Zhangyou,et al.Preparation and slow-release performance of biomass-based slow-release urea[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(5):68-76. DOI： 10.12434/j.issn.2097-2547.20250203.

摘要

现有缓释尿素产品普遍存在生产成本较高及降解产物污染环境等问题，限制了其在农业生产中的应用，因此开发具有环境友好特性的高效低成本缓释尿素是缓释肥料发展的方向。以4种生长形态不同的生物质作为原料，通过物理混合制备了生物质基缓释尿素（Biomass-based slow-release urea，B-SRU），系统比较分析了不同B-SRU缓释性能差异。结果表明，由于生物质原料的结构和组分存在差异，制备温度对不同B-SRU缓释性能有较大影响。随着制备温度升高，草本类B-SRU缓释性能逐渐提高，尿素释放率可降低33.01%，木本类B-SRU缓释性能则呈逐渐降低趋势，藤本类和麻类B-SRU缓释性能分别呈现“V”型和倒“V”型变化规律。SEM和FTIR表征结果证实生物质与尿素之间的结合机制主要为物理致密包裹和氢键网络双重作用。释放动力学分析表明，B-SRU中尿素释放主要受经典Fick扩散主导，尿素分子主要通过生物质基质物理孔隙进行扩散迁移。

Abstract

The existing slow-release urea commonly faces issues such as high production costs and environmental pollution caused by degradation products

which limit their application in agricultural production. Consequently

developing efficient and cost-effective slow-release urea with environmentally friendly characteristics is the direction for the development of slow-release fertilizers. Biomass-based slow-release urea (B-SRU) was prepared by physical mixing

using four biomasses with different growth forms as raw materials. The differences in slow-release performance of different B-SRU were systematically compared and analyzed. The results show that the slow-release performance of different B-SRU exhibits significant variations in response to preparation temperatures due to the differences in structures and compositions of biomass raw materials. With the increase of preparation temperatures

the slow-release performance of herbaceous B-SRU gradually improves and the urea release rate can be reduced by 33.01%. The slow-release performance of woody B-SRU shows a gradually decreasing trend

and the slow-release performances of vine and hemp B-SRU show “V” and inverted “V” patterns in change

respectively. SEM and FTIR characterization results confirm that the binding mechanism between biomass and urea is mainly a dual action of physical dense wrapping and hydrogen bonding network. The release kinetics analysis shows that the release of urea from B-SRU is mainly dominated by classical Fick diffusion

and the urea molecules mainly migrate by diffusion through the physical pores of the biomass matrix.

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references

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